#Author: Tanyong
# *-* coding:utf8 *-*
# @time       : 2018/7/26 8:53
# @Author     : Tanyong
# @Site       : 
# @File       : views.py
# @Software   : PyCharm
import time
from datetime import datetime, timedelta

from flask import current_app, jsonify
from flask import g
from flask import redirect
from flask import render_template
from flask import request
from flask import session
from flask import url_for

from info import constants, db
from info.models import User, News, Category
from info.modules.admin import admin_blu
from info.utils.common import user_login_data
from info.utils.image_storage import image_storage
from info.utils.response_code import RET


@admin_blu.route("/login", methods=['GET', 'POST'])
def login():
    """管理员登录"""
    if request.method == 'GET':
        return render_template("admin/login.html")

    # 1, 取参数, 并校验参数
    data = request.form
    username = data.get("username")
    password = data.get("password")

    if not all([username, password]):
        return render_template('admin/login.html', errmsg="参数不足")

    # 2, 查询user是否存在 , 若不存在,则不用检查密码了
    try:
        user = User.query.filter(User.nick_name==username).first()
    except Exception as e:
        current_app.logger.error(e)
        return render_template('admin/login.html', errmsg='数据查询错误')
    if not user or user.is_admin==False:
        return render_template('admin/login.html', errmsg='管理员用户不存在')

    # 3, 校验密码是否正确
    if not user.check_password(password):
        return render_template('admin/login.html', errmsg='用户名或密码错误')

    # 4, 密码正确, 保存登录信息到 session
    session['user_id'] = user.id
    session['is_admin'] = user.is_admin

    # 5, 返回
    return redirect(url_for('admin.index'))


@admin_blu.route('/index')
@user_login_data
def index():
    """管理后台主页"""
    user = g.user
    if not user:
        return redirect(url_for('index.index'))

    return render_template('admin/index.html', user=user.to_dict())


@admin_blu.route('/logout')
def logout():
    """退出管理后台"""
    session.pop('is_admin')
    session.pop('user_id')
    return redirect('/')

@admin_blu.route('/user_count')
def user_count():
    """
    用户统计
    :return:
    """
    # 查询总人数
    total_count = 0
    try:
        total_count = User.query.filter(User.is_admin==False).count()
    except Exception as e:
        current_app.logger.error(e)

    # 查询月新增数
    mon_count = 0
    try:
        now = time.localtime()
        mon_begin = '%d-%02d-01' % (now.tm_year, now.tm_mon)
        mon_begin_date = datetime.strptime(mon_begin, '%Y-%m-%d')
        mon_count = User.query.filter(User.is_admin == False, User.create_time >= mon_begin_date).count()
    except Exception as e:
        current_app.logger.error(e)

    # 查询日新增数
    day_count = 0
    try:
        now = time.localtime()
        day_begin = '%d-%02d-%02d' % (now.tm_year, now.tm_mon, now.tm_mday)
        day_begin_date = datetime.strptime(day_begin, '%Y-%m-%d')
        day_count = User.query.filter(User.is_admin == False, User.create_time > day_begin_date).count()
    except Exception as e:
        current_app.logger.error(e)

    # 设置当前日期, 定义时间表和人数统计表
    now_date = datetime.strptime(datetime.now().strftime('%Y-%m-%d'), '%Y-%m-%d')
    active_date = []
    active_count = []

    for i in range(0, 31):
        begin_day = now_date - timedelta(days=i)
        end_day = now_date - timedelta(days=(i - 1))
        active_date.append(begin_day.strftime('%Y-%m-%d'))
        count = 0
        try:
            count = User.query.filter(User.is_admin == False, User.last_login >= begin_day,
                                      User.last_login < end_day).count()
        except Exception as e:
            current_app.logger.error(e)
        active_count.append(count)

    # 将表格反转
    active_date.reverse()
    active_count.reverse()

    data = {
        "total_count": total_count,
        "mon_count": mon_count,
        "day_count": day_count,
        "active_date": active_date,
        "active_count": active_count
    }

    return render_template('admin/user_count.html', data=data)


@admin_blu.route('/user_list')
def user_list():
    """用户列表"""
    page = request.args.get("p", 1)

    try:
        page = int(page)
    except Exception as e:
        current_app.logger.error(e)
        page = 1

    users_list = []
    current_page = 1
    total_page = 1
    try:
        paginate = User.query.filter(User.is_admin==False).order_by(User.last_login.desc()).paginate(page, constants.ADMIN_USER_PAGE_MAX_COUNT, False)
        users_list = paginate.items
        current_page = paginate.page
        total_page = paginate.pages
    except Exception as e:
        current_app.logger.error(e)

    user_dict_li = []
    for user in users_list:
        user_dict_li.append(user.to_admin_dict())

    data = {
        "users": user_dict_li,
        "current_page": current_page,
        "total_page": total_page
    }

    return render_template('admin/user_list.html', data=data)

@admin_blu.route('/news_review')
def news_review():
    """
    新闻审核
    :return:
    """
    page = request.args.get("p", 1)
    keywords = request.args.get('keywords')

    try:
        page = int(page)
    except Exception as e:
        current_app.logger.error(e)
        page = 1

    filters = [News.status != 0]
    if keywords:
        filters.append(News.title.contains(keywords))

    news_list = []
    current_page = 1
    total_page = 1
    try:
        paginate = News.query.filter(*filters).order_by(News.create_time.desc()).paginate(page,
                                                                                                       constants.ADMIN_NEWS_PAGE_MAX_COUNT,
                                                                                                       False)
        news_list = paginate.items
        current_page = paginate.page
        total_page = paginate.pages
    except Exception as e:
        current_app.logger.error(e)

    news_dict_li = []
    for new in news_list:
        news_dict_li.append(new.to_review_dict())

    data = {
        "news": news_dict_li,
        "current_page": current_page,
        "total_page": total_page
    }
    return render_template('admin/news_review.html', data=data)


@admin_blu.route('/news_review_detail', methods=['GET', 'POST'])
def news_review_detail():
    """新闻审核详情页"""
    if request.method == 'GET':
        # 获取新闻id
        news_id = request.args.get("news_id")
        if not news_id:
            return render_template('admin/news_review_detail.html', data={"errmsg": "未查询到此新闻"})

        # 通过id查询新闻
        news = None
        try:
            news = News.query.get(news_id)
        except Exception as e:
            current_app.logger.error(e)

        if not news:
            return render_template('admin/news_review_detail.html', data={"errmsg": "未查询到此新闻"})

        # 返回数据
        data = {"news": news.to_dict()}

        return render_template('admin/news_review_detail.html', data=data)

    # POST请求,进行审核
    # 1.获取参数
    news_id = request.json.get("news_id")
    action = request.json.get("action")

    # 2.判断参数
    if not all([news_id, action]):
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")
    if action not in ("accept", "reject"):
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

    try:
        # 3.查询新闻
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="数据查询错误")

    if not news:
        return jsonify(errno=RET.NODATA, errmsg="未查询到数据")

    # 4.根据不同的状态设置不同的值
    if action == "accept":
        news.status = 0
    else:
        # 拒绝通过，需要获取原因
        reason = request.json.get("reason")
        if not reason:
            return jsonify(errno=RET.PARAMERR, errmsg="参数错误")
        news.reason = reason
        news.status = -1

    # 保存数据库
    try:
        db.session.commit()
    except Exception as e:
        current_app.logger.error(e)
        db.session.rollback()
        return jsonify(errno=RET.DBERR, errmsg="数据保存失败")
    return jsonify(errno=RET.OK, errmsg="操作成功")


@admin_blu.route('/news_edit')
def news_edit():
    """新闻版式编辑"""
    page = request.args.get("p", 1)
    keywords = request.args.get('keywords')

    try:
        page = int(page)
    except Exception as e:
        current_app.logger.error(e)
        page = 1

    filters = [News.status == 0]
    if keywords:
        filters.append(News.title.contains(keywords))

    news_list = []
    current_page = 1
    total_page = 1
    try:
        paginate = News.query.filter(*filters).order_by(News.create_time.desc()).paginate(page,
                                                                                          constants.ADMIN_NEWS_PAGE_MAX_COUNT,
                                                                                          False)
        news_list = paginate.items
        current_page = paginate.page
        total_page = paginate.pages
    except Exception as e:
        current_app.logger.error(e)

    news_dict_li = []
    for new in news_list:
        news_dict_li.append(new.to_basic_dict())

    data = {
        "news_list": news_dict_li,
        "current_page": current_page,
        "total_page": total_page
    }
    return render_template('admin/news_edit.html', data=data)


@admin_blu.route('/news_edit_detail', methods=['GET', 'POST'])
def news_edit_detail():
    """新闻版式编辑详情页"""
    if request.method == 'GET':
        # 获取参数
        news_id = request.args.get("news_id")

        if not news_id:
            return render_template('admin/news_edit_detail.html', data={"errmsg": "未查询到此新闻"})

        # 查询新闻
        news = None
        try:
            news = News.query.get(news_id)
        except Exception as e:
            current_app.logger.error(e)

        if not news:
            return render_template('admin/news_edit_detail.html', data={"errmsg": "未查询到此新闻"})

        # 查询分类的数据
        categories = Category.query.all()
        categories_li = []
        for category in categories:
            c_dict = category.to_dict()
            c_dict["is_selected"] = False
            if category.id == news.category_id:
                c_dict["is_selected"] = True
            categories_li.append(c_dict)
        # 移除`最新`分类
        categories_li.pop(0)

        data = {"news": news.to_dict(), "categories": categories_li}
        return render_template('admin/news_edit_detail.html', data=data)

    # POST请求, 对新闻版式进行编辑
    news_id = request.form.get("news_id")
    title = request.form.get("title")
    digest = request.form.get("digest")
    content = request.form.get("content")
    index_image = request.files.get("index_image")
    category_id = request.form.get("category_id")
    # 1.1 判断数据是否有值
    if not all([title, digest, content, category_id]):
        return jsonify(errno=RET.PARAMERR, errmsg="参数有误")

    news = None
    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)
    if not news:
        return jsonify(errno=RET.NODATA, errmsg="未查询到新闻数据")

    # 1.2 尝试读取图片
    if index_image:
        try:
            index_image = index_image.read()
        except Exception as e:
            current_app.logger.error(e)
            return jsonify(errno=RET.PARAMERR, errmsg="参数有误")

        # 2. 将标题图片上传到七牛
        try:
            key = image_storage(index_image)
        except Exception as e:
            current_app.logger.error(e)
            return jsonify(errno=RET.THIRDERR, errmsg="上传图片错误")
        news.index_image_url = constants.QINIU_DOMIN_PREFIX + key
    # 3. 设置相关数据
    news.title = title
    news.digest = digest
    news.content = content
    news.category_id = category_id

    # 4. 保存到数据库
    try:
        db.session.commit()
    except Exception as e:
        current_app.logger.error(e)
        db.session.rollback()
        return jsonify(errno=RET.DBERR, errmsg="保存数据失败")
    # 5. 返回结果
    return jsonify(errno=RET.OK, errmsg="编辑成功")


@admin_blu.route('/news_category')
def news_category():
    """新闻分类管理"""
    # 获取所有的分类数据
    categories = Category.query.all()
    # 定义列表保存分类数据
    categories_dicts = []

    for category in categories:
        # 获取字典
        cate_dict = category.to_dict()
        # 拼接内容
        categories_dicts.append(cate_dict)

    categories_dicts.pop(0)
    # 返回内容
    return render_template('admin/news_type.html', data={"categories": categories_dicts})


@admin_blu.route('/add_category', methods=["POST"])
def add_category():
    """修改或者添加分类"""

    category_id = request.json.get("id")
    category_name = request.json.get("name")
    if not category_name:
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")
    # 判断是否有分类id
    if category_id:
        try:
            category = Category.query.get(category_id)
        except Exception as e:
            current_app.logger.error(e)
            return jsonify(errno=RET.DBERR, errmsg="查询数据失败")

        if not category:
            return jsonify(errno=RET.NODATA, errmsg="未查询到分类信息")

        category.name = category_name
    else:
        # 如果没有分类id，则是添加分类
        category = Category()
        category.name = category_name
        db.session.add(category)

    try:
        db.session.commit()
    except Exception as e:
        current_app.logger.error(e)
        db.session.rollback()
        return jsonify(errno=RET.DBERR, errmsg="保存数据失败")
    return jsonify(errno=RET.OK, errmsg="保存数据成功")


